α-Chloro-β,γ-ethylenic Esters: Enantiocontrolled Synthesis and Substitutions
作者:Douglas T. Genna、Christopher P. Hencken、Maxime A. Siegler、Gary H. Posner
DOI:10.1021/ol102142a
日期:2010.10.15
γ-seleno-α,β-ethylenic esters, when treated with sulfuryl chloride and ethyl vinyl ether in hexanes, produced α-chloro-β,γ-ethylenic esters in 65−75% yields, with ee values of 95−97%, and with 1,3-syn transfer of chirality. Reaction of these allylic chloride electrophiles with methylcuprate and with sodium azide nucleophiles afforded exclusively γ-substituted-α,β-ethylenic esters with faithful anti-transfer
(R)-4-Methyl-1-nonanol, the sexpheromone of the yellow mealworm (Tenebrio Molitor L.), was synthesized by using non-cross-linked polystyrene supported oxazolidinone as a chiral auxiliary. The stereoselectivesynthesis was achieved by asymmetric Michael addition of an organocopper reagent to non-cross-linked polystyrene supported N-crotonoyoxazolidinone, and the target product was obtained in an overall
Stereoselective synthesis of the sex pheromone of the yellow mealworm using (S)-4-benzyloxazolidinone as chiral auxiliary
作者:D. L. Li、C. F. Lu、G. C. Yang、Z. X. Chen
DOI:10.1007/s10600-010-9636-z
日期:2010.7
(R)-4-Methyl-1-nonanol, the sexpheromone of the yellow mealworn (Tenebrio molitor L.), was synthesized with high stereoselectivity using (S)-4-benzyloxazolidinone as chiralauxiliary. The stereoselectivesynthesis was achieved by asymmetric Michael addition of organocopper reagent to N-crotoyloxazolidinone, and the target product was obtained in an overall yield of 41.8% over 7 steps.
(R)-4-Methyl-1-nonanol 是黄粉蚧 (Tenebrio molitor L.) 的性信息素,使用 (S)-4-benzyloxazolidinone 作为手性助剂以高立体选择性合成。通过有机铜试剂与N-巴豆酰恶唑烷酮的不对称迈克尔加成实现立体选择性合成,7步得到目标产物,总收率为41.8%。
SN2′ Alkylation of Chiral Allylic CyanohydrinO-Phosphates with Organocuprates
作者:Alejandro Baeza、Carmen Nájera、José M. Sansano
DOI:10.1002/ejoc.200600822
日期:2007.3
This work has been supported by the DGES of the Spanish Ministerio de Educacion y Ciencia (MEC) (CTQ2004-00808/BQU), the Generalitat Valenciana (CTIOIB/2002/320, GRUPOS03/134 and GV05/144) and the University of Alicante.
Optically pure acyclic bifunctional compounds from (?)-menthone. Synthesis ofR-4-methyl-1-nonanol, the sex pheromone of the larger flour beetle (Tenebrio molitor L.)
作者:V. N. Odinokov、G. Yu. Ishmuratov、M. P. Yakovleva、R. L. Safiullin、V. D. Komissarov、G. A. Tolstikov
DOI:10.1007/bf00702016
日期:1993.7
novel methyl-branched chirones were prepared starting from (−)-menthone and making use of a novel, efficient, and selective oxidant, decanepersulfonic acid (DPSA). Opticallypure (4R)-methyl-1-nonanol, the sexpheromone of the larger flour beetle (Tenebrio molitor L.), was synthesized.
以 (-)-薄荷酮为原料,利用新型、高效和选择性的氧化剂癸烷过磺酸 (DPSA),制备了许多新型甲基支化手性酮。合成了光学纯 (4R)-甲基-1-壬醇,即较大的面粉甲虫 (Tenebrio molitor L.) 的性信息素。